Bump bhyve allocation up to 20 bits to avoid
birthday-paradox style address collisions when
bhyve VMs are connected to the same broadcoast
domain and are using pseudo-random allocations.

Reviewed by:	gnn
MFC after:	1 week
- Include /etc/newsyslog.conf.d/* and /usr/local/etc/newsyslog.conf.d/* by
  default for newsyslog(8).

  The /usr/local/etc/newsyslog.conf.d will give packages an opportunity to
  install a default configuration to handle their own log files.

MFC after:	2 weeks
Relnotes:	yes